Chair



Dec. 16, 1930.

fl.. H. cLARK ET AL 1,785,337

CHAIR Filed June 2l, 1928 LEON n. CLARK 'AND WILLIAM si isnivefinnl or` sIGNoRs To Y'gluin- "sIxns ''confiuseifsr;or` uitlenen iii-A ENN'sYnvfAnIa CHAI . This invention relates to improvements in2- Vchairs and isparticularly directed toan"jad;*

justment for the back of a chair.

VIn chairs, particularly those intended f forfr a person at `work at adesk, or those intended for service for a considerablelength of time,l

` it is frequently necessary to quickly adjust the back of the *chairv vertically toaccommo date the'particular needs oftheoccupant l It" is also necessary under other conditions, as when one chairis used fora number of differvent people, to provide forv thisquickadjustf- Y mentof the back in order to secure the maxi- This invention is designed to provide a f means being provided for temporarilyretainf' ing the chairback in its adjusted position curved or smallportionfof'tlie back; tortlnis` j. f or'jA the occuagainst inadvertent motion. Y

Further objects are Vto providea novel formr A of chair back adjustment which permits the Y in the accompanying drawings in which :A f-

. Figure 1 Va fiat face against which the flat faceof a rapidity of adjustment mentioned above, but which at the same time, secures the requisite strength without requiring any complicated or costly mechanism.

An embodiment of thefinvention is shown Figure 1 is a rear view of the vupper portion of a chair provided with the` adjustable back;

Figure 2 is a view on the line 2 2 of Figure 3 is a sectional view on the line 3 3 of Figure 1.

yReferring tothe drawings, itwill be seen that a chair Vseat 1 has beenindicated'aspro-V vided with; a bracket 2 attached thereto any suitable manner, as for instance, by means of screws 3, although obviously other brackets and other modes of attachmentcould be employed` without departing `from the spirit of this invention. i f i j t At all events, the bracket is provided withf"` a downwardly extending arm 4 providedfwth v transverse bar 5' contacts. This transverse bar is preferably enlarged -at its center, as

indicated at 6, and atthisenlarged portion it is provided with-two rows of depressicmsflf,V

Application led June 21;`j i

`; plunge'rs being of 'the' conventional de v'The-transversebar'o1 niemb .withffa bolt e"whchffpasssfthrugh an *e1-0 .1; i gated vertical` slot 10` jformed "in the f' ai l ofthe biacketfsojas t permitlimitediver cal sliding-inotionof tlie"`bar5 witlfreference; dfi the arm-54 of ithe"bracketlY The baii-i's curved" intransversegci'ess section; as shownfin Figurej' 1y curved atl the portionV indicated f by T eseL ydepressions-v adapted ojrec'e heads Y of spring `"pressed `-jgluiige of- 1: standard const ru tionl Figure 2,;Or` instan ifrhsersiide arms are fefauyfearw refefeneeicharaeaf: i4- iaFigt-fe 1i and uw back 13y L preferably j 44sl'iaped to 5 t i; tlie""" er 4 is provA lthe i secur@ il@l maximum, Cmflo It is` apparent, therefore, th'atthere is I one position only forwhich maximumcomfort isyobtained for any givenoccupant. This position of the back is readily obtainedby of the occupant.

The spring plungers ,8, vof fcourse, Y. may be` v replacedjbyj other spring'pressed fasteners,l l as desired, without departing fromthe spirit ofthe inventionandfalthough tworows'of f apertures or recesses 7 havebeen disclosed, yit

only need be einl lS Obvious 'Ployed if. desired.Y s

Further, it is` preferable to provide the arm 5 withv a pairioffforwardly projecting :`l

ribs 15, as showninjiFigure 3, to ,Contact with the guidetor arm 4, and `to thus prevent lateral'rocking of the-back.

VIt will be seenA that thel construction of fthe chairi is extremely simple and ymay be fvery'clleerly Pro'flueol.;

yFurther-, lthere are no complicated' or delicate ,parts and there is nofastenlng, such yas a b olt`,"wing` nut, or "handwheel whichneed be operated to Vsecure the adjustment of the 10o u back. Insteadgthe beek matafrbefaldjusted'by *merely graspng'it and pnshin'g-'it to Vthe place desired. ,.V' fg in" 1 la Although thefinvention hasbeen desoribecl Y in considerable desail,A snchdeseription is ini n i ggtion-and, movablegin the-slot 'in the-alrm5v tended as, iuusmnygmther than-1mm as theifmzentorr mayi bevariouslyembodie and-'as the-scope of Suchin'Veno Y -to be determinedfas/clarilnedf ing belowfthefseayla tranfsvergefbar.having?" 0f ,the Side a r 111s5,. la transer'selenlargement f at thev intermediate. Vportion-f of" the bar ex-ig zo@ tending beyond one ofthe-longitudinal edges; ofthe bar andi formed with a,.plura1ityof-'deiA pressions arranged., in Vspread 'relftion1longfVv l A y; Y tndinallyofthe enlargement, abolt oarrfed`- ff `bythe transversebarg at itsintermediate,por@;

springpressedfplungersfmedbyfthearm e and adapted to, engage the depressiomfory re, `V taining the g backg in yn-rions adjuted posi;

tions, with resp@017300:theseatv andSpaCd `IbS l 30;, extending transversely of the barjnpon '10pposiesides offetheyarnrigofform agguidegfor Y ff` Y In-testimony @hat A werlyim the/1 foregoing Wehave hereunto set outhands at Pla-ilaclelf:W

amphi@ the. county off-lhi-ladelphie and@ yi i l :nylon-H.4

'ofPennsylvania. ;.M Y l [WILLIAM s. SENGPEL 

